Pass to compute livein info

Hi all,

Is there a pass that computes livein information for each MachineBasicBlock? I tried to find such a pass but could not find any. I am trying to use the livein information to get dead registers to insert some instructions right before code emission but the livein information seems to be invalidated by some pass. I might need to recompute the livein information before my pass. Thanks a lot.


No, the liveness is not preserved by late code generation passes, and there is currently no way of recomputing it.